7RUM loads

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Hi all,

I have a new Remington Sendero chambered 7RUM and have started load development and are currently useing Nosler Accubond 160grn projectiles, problem is of course it has a awefully long throat and practically impossible to seat the projectile out to the lands.
What is a minimum amount of projectile needed seated in the neck,not taking into account the magazine size?
If anyone can help with this or has had success with a particular load & method i would appreciate any feedback.

Thanks from New Zealand